本文用常温云纹法与数值模拟法研究了筒体锻件整体镦粗与局部镦粗工艺的变形规律，得到了整体镦粗工艺的坯料尺寸图。

The deformation law of both solid and local upsetting processes for cylinder forging is investigated by moire method at room temperature and numerical simulation in this paper.

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运用高温云纹法模拟技术，对中心压实锻造法(J·T·S)现行生产工艺进行实验研究，提出了改进意见。

J. T. s forging process is investigated for improving in current production by high temperature moire modelling technique.

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